STARLINK-35549, 66139
Orbit data source: Space-Track
STARLINK-35549, 66139 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 22 Oct 2025 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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66139 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational spacecraft
Bus & Motor
STARLINK V2MO, Unknown motor
Mass
575 kg wet, ~530 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown shape, 17.7 m
Radar Cross Section
RCS unknown
Expand to show TLE details & historyLast TLE update: 4 hours ago
TLE from 4 hours ago
0 STARLINK-35549
1 66139U 25237AB 25311.83336806 -.01829174 00000-0 -15933-1 0 9999
2 66139 53.1600 252.9851 0001020 105.3015 132.7007 15.71655878 3862Epoch: 2025-11-07T20:00Z
TLE epoch observation values (Epoch: 2025-11-07T20:00:03.000Z)
Latitude
-42.94956°
Longitude
129.60762°
Altitude
369.005 km
Speed
7.688 km/s
True Right ascension
07h 47m 34s
True Declination
-42° 46' 05"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
20:30:41
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
355.112 km
Perigee altitude
353.738 km
Semi-major axis
6,732.562 km
Eccentricity
0.0001
Inclination
53.16°
RAAN
252.9851°
Arg. of periapsis
105.3015°
True anomaly
132.70929°
Mean anomaly
132.7007°
Eccentric anomaly
132.70499°
Mean motion
3.92891 °/min
Orbital period
91.63 mins
BSTAR
-0.015933
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Other satellites on launch #237 in the year 2025 (2025-10-22 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.STARLINK-35549 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2025-11-08 06:12:21.694Z | 291.661° WNW | 2025-11-08 06:13:21.694Z | 252.178° W | 39.144° | 2025-11-08 06:16:21.694Z | 143.564° SSE |
| 4 mins | 2025-11-08 22:41:21.694Z | 219.509° SW | 2025-11-08 22:43:21.694Z | 114.252° SE | 43.182° | 2025-11-08 22:45:21.694Z | 55.8° ENE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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